<p>To reveal the current state of in-situ stresses in the Heze coal basin and to interpret the implications of the stress regime for coal exploitation and regional geological tectonics evolution, hydraulic fracturing, overcoring, and acoustic emission stress measurements were performed in this region and seismic data in and around the region were compiled. The stress state in the study area exhibits significant complexity and variability. The <i>σ</i>_H, <i>σ</i>_h, and <i>σ</i>_v values increase in a roughly linear relationship with depth. Under the contemporary stress condition, a prevailing thrust faulting stress regime (<i>σ</i>_H &gt; <i>σ</i>_h &gt; <i>σ</i>_v) is favored, and a transition between thrust and strike-slip (<i>σ</i>_H &gt; <i>σ</i>_v &gt; <i>σ</i>_h) stress regime currently exists at the measurement depths. The stress level is comparatively high and is not conducive to the stability of underground structures. The stress ratios <i>K</i>_H, <i>K</i>_h, <i>K</i>_av, and <i>K</i>_Hh have no significant mathematical relationship with depth, and their average values can respectively represent their variation trends versus depth. The <i>σ</i>_H directions derived from the stress measurements and focal mechanism solutions are principally between ENE–WSW and WNW–ESE, and the average near ENE, which is identical to other stress indicators in and around the study area. The contemporary stress conditions in this region generally inherit the fourth stage tectonic stress field, while some retain the features of the second and third stages tectonic stress field. A close correlation exists between the direction of the current stress field and historical geological structural elements in this region.</p>