At present, flexible wearable sensors are widely used to monitor the data in the process of human breathing and movement, and hydrogel as the core material of flexible wearable sensors, still has some problems such as poor performance. In order to prepare hydrogels with excellent performance through simple synthesis steps and low-cost raw materials, in this paper, calcium chloride (CaCl₂), lithium chloride (LiCl) and glycerol (Gly) were added to the hydrogel network of polyvinyl alcohol (PVA) and polyacrylamide (PAM), to prepare a PVA / PAM/ CaCl₂/ Gly / LiCl ( PACGL for short) dual-network ionic conductive hydrogel with dual monitoring of humidity and movement by UV curing and repeated freeze-thaw. The structure and properties of the hydrogel were characterized by FT-IR, TGA, SEM and mechanical stretching. The results show that the hydrogel has a honeycomb porous structure with tough and straight holes. It has excellent tensile stress (513.36 kPa) and tensile strain (328% ). At the same time, it has good frost resistance and conductivity (1.49 S / m). What is more, it can respond quickly in monitoring, the response time of respiratory monitoring is 0.24 s and the recovery time reaches 0.36 s; in the aspect of motion monitoring, taking wrist bending as an example, the response time and recovery time are both 0.36 s. The hydrogel developed in this paper can be used in flexible multifunctional sensors, which can be used for real-time monitoring of human respiratory frequency and depth, and can also be used for monitoring human motion process.