A compact fiber sensing probe is proposed, and the magnetic field and temperature are simultaneously measured. The cascaded magnetic and non-magnetic polymer films ae integrated with the fiber to form the sensing probe, which is obtained using simple dipping and UV curing technologies. The temperature sensitivities of dips A and B are 0 and 381.7 pm/℃, and the magnetic fields sensitivities are 48.9 pm/mT and 55.4 pm/mT, respectively. The simultaneous measurements of magnetic field and temperature are obtained using the method of sensitivity matrix. The sensing probe may find a widespread application in aerospace space, geophysical research, and medical fields due to its easy fabrication process, high sensitivity, compactness, and good stability.