The invention discloses a suspension-type space force measuring system, which belongs to the technical field of force measuring equipment. The suspension-type space force measuring system comprises an upper pulling rod and two lower pulling rods, wherein the upper pulling rod is serially connected with a pulling force sensor and an angle sensor, one end connected with the pulling force sensor is connected onto upper suspension of a three-point suspension bracket of a tractor, and the other end is connected with an upper connection rod node of a to-be-measured implement connection frame; one end of each lower pulling rod is connected with the tractor and the other end is connected with a force measuring sensor, and the signal line of the force measuring sensor is connected with the crossbeam of the to-be-measured implement; and the pulling force sensor, the angle sensor and the two force measuring sensors are connected with a computer through receiving and data acquisition devices, and a joint force in each direction is calculated and displayed through the computer. The voltage value outputted by each sensor in the case of field work by a farm implement can be recorded in real time, and the traction force can be obtained accurately. The suspension-type space force measuring system is suitable for measuring the size of the traction force of any farm implement in three-point suspension connection and the force of soil acting on the implement.