The invention discloses a load transmitting device for installation of a small solid engine. The load transmitting device comprises a circular ring installation support and four landing leg components; the circular ring installation support is horizontally arranged and provided with a plurality of first bolt connecting holes, and the four landing leg components are the same in structure and each comprise a landing leg body and a connecting plate; each connecting plate is horizontally arranged and fixedly connected with the lower end of the corresponding landing leg body, and at least one second bolt connecting hole is formed in each connecting plate; and the four landing leg components are evenly distributed in the circumferential direction of the circular ring installation support and enable the upper ends of the landing leg bodies to be fixedly connected with the outer circumferential edge of the circular ring installation support, and the circular ring installation support and the four landing leg components are manufactured into a whole through a die forging rapid molding process. The load transmitting device has the beneficial effects of being simple in structure, easy to manufacture and low in cost; by means of the load transmitting device, the aims of high accuracy, high intensity and small weight can be achieved; and in addition, the composite cost can be effectively reduced.