Weighing system for blood purification, using method and continuous blood purification equipment

The invention discloses a weighing system for blood purification, a using method and continuous blood purification equipment, the weighing system comprises a weighing mechanism used for obtaining weight data of a liquid bag, and the weighing mechanism comprises a weighing sensor and a weighing sensor fixing block; the weighing sensor is installed on a shell of the equipment host through a weighing sensor fixing block, the weighing sensor is electrically connected with a data processing board of the weighing system through a signal line, and a hanging mechanism used for hanging a liquid bag is arranged at the stress end of the weighing sensor; the weighing sensor fixing block is provided with a guide groove used for being matched with a signal line of the weighing sensor, after the weighing sensor is installed, the signal line is fixed in the guide groove, it can be guaranteed that the position of the signal line is stable in the working process of the weighing sensor, and therefore the situation that the sign