The polymer proppant and method for producing the same relate to oil and gas production technology using materials of high-molecular weight compounds with higher requirements for physical and mechanical properties. The proppant is used as propping granules utilized in the oil and gas production by a method of hydraulic fracturing of formation. The technical result achieved by implementation of the present invention is an increase in thermal strength of the proppant whose material provides a compressive strength of at least 150 MPa at a temperature of not less than 100° C. The polymer proppant represents microspheres of metathesis-radically cross-linked mixture of oligocyclopentadienes.