Hermann Schmitz, founder of new phenomenology, regards Heidegger's existential analysis in Sein und Zeit as a masterpiece of strict subjectivity. However, this strict subjectivity there is alienated. Although Heidegger had broken through the 'inner world' hypothesis and had thus transcended the subjectivity by Husserl, he overlooked the basis of the strict subjectivity-the 'felt-body' (Leib) and eventually distorted the situation ontology in the embryonic stage. As a result, he missed the opportunity of establishing an appropriate subjectivity theory through literal 'being-in-the-world'(in-der-Welt-sein). The new phenomenology probes into the significance of the 'feltbody' in 'beingintheworld' and proposes a more organized theory of situation ontology.On the basis of corporalemotional fact (subjective fact), it also refines 'being-in-the-World' under the horizon of the new phenomenology, namely the strict subjectivity.