本文叙述了固体力学、流体力学、一般力学与控制理论、机械原理、计算力学、实验力学以及工程热物理等力学学科在国民经济各部门中的应用及其待解决的迫切问题。文章对力学领域中至今未得到较好解决的问题,如湍流、摩擦、塑性等问题的现状与今后的研究方向也作了简要的描述。文章还列举了许多从实践中提出的力学新分支学科与力学问题。 This paper describes the application of mechanics such as solid mechanics, fluid mechanics, general mechanics and control theory, mechanical theory, computational mechanics, experimental mechanics and engineering thermophysics in various departments of the national economy and the urgent problems to be solved. The article also gives a brief description of the problems in the field of mechanics, such as turbulence, friction and plasticity, which have not been solved so far, and the future research directions. The article also lists many new branches of mechanics and mechanics proposed in practice.